Bluetooth earpiece with a cell phone? Or FRS radios?
Kirsten
run/bike log
zoomylicious
'11 Cannondale SuperSix 4 Rival
'12 Salsa Mukluk 3
'14 Seven Mudhoney S Ti/disc/Di2
"Well behaved women rarely make history." including me!
http://twoadventures.blogspot.com